Schneider Electric 4000 SCALING ALARM SETPOINTS

Chapter 6—Alarms 63230-300-212

Scaling Alarm Setpoints April 2001

This sectionis for users who do not have SMS and must set up alarms fr om

the circuitmonitor display. It explainshow to scale alarm setpoints.

Whenthe circuit monitor is equipped with a display,the display area is 4 x 20

characters,which limits the displaying of most metered quantitiesto five

characters(plus a positive or negative sign). The displaywill al so showthe

engineeringunits applied to that quantity

.

Todetermine the proper scaling of an alarm setpoint, view the register

numberfor the associated scale group.The scale factor is the number in the

Deccolumn for that register. For example,the register number for Scale D to

PhaseVolts is 3212. If the number in the Dec column is 1, the scalefactor is

10 (101=10). Remember that scalefactor 1 in Table6–1 on page 91 for Scale

GroupD is measured in kV.Therefore, to define an alarm setpoint of125 kV,

enter 12.5 because12.5 multiplied by 10 is 125. Below is a table listing the

scale groupsand their register numbers.

Scale Group D—Voltage, L–L Voltage

0–3,276.7V –1

0–32,767V 0 (default)

0–327.67kV 1

0–3,276.7kV 2

Scale Group E—

NeutralVoltage,L–N, N–G Voltage

0–3,276.7V –1 (default)

0–32,767V 0

0–327.67kV 1

0–3,276.7kV 2

Scale Group F—Power kW, kVAR, k VA Power

0–32.767kW, kVAR,kVA –3

0–327.67kW, kVAR,kVA –2

0–3,276.7kW, kVAR,kVA –1

0–32,767kW, kVAR,kVA 0 (default)

0–327.67MW, MVAR, MVA 1

0–3,276.7MW, MVAR,MVA 2

0–32,767MW, MVAR, MVA 3

Tabl e 6–2: Scale Group Register Numbers

ScaleGroup Register Number

Scale Group A—Phase Current 3209

Scale Group B—Neutral Current 3210

Scale Group C—Ground Current 3211

Scale Group D—Voltage, L–L3212

Scale Group E—

NeutralVoltage,L–N, N–G3213

Scale Group F—PowerkW, kVAR,kVA 3214

Tabl e 6–1: Scale Groups

ScaleGroup MeasurementRange Scale

Factor

SCALING ALARM SETPOINTS